new file mode 100644
--- /dev/null
+++ b/src/ov-typeinfo.h
@@ -0,0 +1,146 @@
+/*
+
+Copyright (C) 1996 John W. Eaton
+
+This file is part of Octave.
+
+Octave is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 2, or (at your option) any
+later version.
+
+Octave is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with Octave; see the file COPYING.  If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+*/
+
+#if !defined (octave_value_typeinfo_h)
+#define octave_value_typeinfo_h 1
+
+#if defined (__GNUG__)
+#pragma interface
+#endif
+
+#include <string>
+
+#include "Array.h"
+#include "Array2.h"
+#include "Array3.h"
+
+#include "ov.h"
+
+class string_vector;
+
+class
+octave_value_typeinfo
+{
+public:
+
+  static int register_type (const string&);
+
+  static bool register_binary_op (octave_value::binary_op, int, int,
+				  octave_value::binary_op_fcn);
+
+  static bool register_assign_op (int, int, octave_value::assign_op_fcn);
+
+  static bool register_pref_assign_conv (int, int, int);
+
+  static bool register_widening_op (int, int, octave_value::widening_op_fcn);
+
+  static octave_value::binary_op_fcn
+  lookup_binary_op (octave_value::binary_op op, int t1, int t2)
+  {
+    return instance->do_lookup_binary_op (op, t1, t2);
+  }
+
+  static octave_value::assign_op_fcn
+  lookup_assign_op (int t_lhs, int t_rhs)
+  {
+    return instance->do_lookup_assign_op (t_lhs, t_rhs);
+  }
+
+  static int
+  lookup_pref_assign_conv (int t_lhs, int t_rhs)
+  {
+    return instance->do_lookup_pref_assign_conv (t_lhs, t_rhs);
+  }
+
+  static octave_value::widening_op_fcn
+  lookup_widening_op (int t, int t_result)
+  {
+    return instance->do_lookup_widening_op (t, t_result);
+  }
+
+  static string_vector installed_type_names (void)
+  {
+    return instance->do_installed_type_names ();
+  }
+
+protected:
+
+  octave_value_typeinfo (void)
+    : num_types (0), types (32, string ()),
+      binary_ops (octave_value::num_binary_ops, 32, 32,
+		  (octave_value::binary_op_fcn) 0),
+      assign_ops (32, 32, (octave_value::assign_op_fcn) 0),
+      pref_assign_conv (32, 32, -1),
+      widening_ops (32, 32, (octave_value::widening_op_fcn) 0)  { }
+
+private:
+
+  static octave_value_typeinfo *instance;
+
+  int num_types;
+
+  Array<string> types;
+
+  Array3<octave_value::binary_op_fcn> binary_ops;
+
+  Array2<octave_value::assign_op_fcn> assign_ops;
+
+  Array2<int> pref_assign_conv;
+
+  Array2<octave_value::widening_op_fcn> widening_ops;
+
+  int do_register_type (const string&);
+
+  bool do_register_binary_op (octave_value::binary_op, int, int,
+			      octave_value::binary_op_fcn);
+
+  bool do_register_assign_op (int, int, octave_value::assign_op_fcn);
+
+  bool do_register_pref_assign_conv (int, int, int);
+
+  bool do_register_widening_op (int, int, octave_value::widening_op_fcn);
+
+  octave_value::binary_op_fcn
+  do_lookup_binary_op (octave_value::binary_op, int, int);
+
+  octave_value::assign_op_fcn do_lookup_assign_op (int, int);
+
+  int do_lookup_pref_assign_conv (int, int);
+
+  octave_value::widening_op_fcn do_lookup_widening_op (int, int);
+
+  string_vector do_installed_type_names (void);
+
+  // No copying!
+
+  octave_value_typeinfo (const octave_value_typeinfo&);
+
+  octave_value_typeinfo& operator = (const octave_value_typeinfo&);
+};
+
+#endif
+
+/*
+;; Local Variables: ***
+;; mode: C++ ***
+;; End: ***
+*/